/*******************************************************************************
 * Copyright (c) 2004 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.wst.html.ui;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.eclipse.core.runtime.Platform;
import org.eclipse.jdt.ui.PreferenceConstants;
import org.eclipse.jdt.ui.text.JavaSourceViewerConfiguration;
import org.eclipse.jdt.ui.text.JavaTextTools;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.text.IAutoEditStrategy;
import org.eclipse.jface.text.IAutoIndentStrategy;
import org.eclipse.jface.text.ITextDoubleClickStrategy;
import org.eclipse.jface.text.ITextHover;
import org.eclipse.jface.text.contentassist.ContentAssistant;
import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
import org.eclipse.jface.text.contentassist.IContentAssistant;
import org.eclipse.jface.text.formatter.IContentFormatter;
import org.eclipse.jface.text.formatter.MultiPassContentFormatter;
import org.eclipse.jface.text.information.IInformationPresenter;
import org.eclipse.jface.text.information.IInformationProvider;
import org.eclipse.jface.text.information.InformationPresenter;
import org.eclipse.jface.text.reconciler.IReconciler;
import org.eclipse.jface.text.reconciler.IReconcilingStrategy;
import org.eclipse.jface.text.source.ISourceViewer;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.eclipse.ui.texteditor.ITextEditor;
import org.eclipse.wst.css.core.internal.text.rules.StructuredTextPartitionerForCSS;
import org.eclipse.wst.css.ui.contentassist.CSSContentAssistProcessor;
import org.eclipse.wst.css.ui.style.LineStyleProviderForEmbeddedCSS;
import org.eclipse.wst.html.core.format.HTMLFormatProcessorImpl;
import org.eclipse.wst.html.core.internal.text.rules.StructuredTextPartitionerForHTML;
import org.eclipse.wst.html.ui.internal.contentassist.HTMLContentAssistProcessor;
import org.eclipse.wst.html.ui.internal.contentassist.NoRegionContentAssistProcessorForHTML;
import org.eclipse.wst.html.ui.style.LineStyleProviderForHTML;
import org.eclipse.wst.html.ui.taginfo.HTMLBestMatchHoverProcessor;
import org.eclipse.wst.html.ui.taginfo.HTMLInformationProvider;
import org.eclipse.wst.html.ui.taginfo.HTMLTagInfoHoverProcessor;
import org.eclipse.wst.javascript.common.ui.contentassist.JavaScriptContentAssistProcessor;
import org.eclipse.wst.javascript.common.ui.style.LineStyleProviderForJavaScript;
import org.eclipse.wst.javascript.common.ui.taginfo.JavaScriptBestMatchHoverProcessor;
import org.eclipse.wst.javascript.common.ui.taginfo.JavaScriptInformationProvider;
import org.eclipse.wst.javascript.common.ui.taginfo.JavaScriptTagInfoHoverProcessor;
import org.eclipse.wst.sse.core.IModelManager;
import org.eclipse.wst.sse.core.IModelManagerPlugin;
import org.eclipse.wst.sse.core.IStructuredModel;
import org.eclipse.wst.sse.core.format.StructuredFormattingStrategy;
import org.eclipse.wst.sse.core.text.rules.StructuredTextPartitioner;
import org.eclipse.wst.sse.ui.EditorPlugin;
import org.eclipse.wst.sse.ui.StructuredTextReconciler;
import org.eclipse.wst.sse.ui.StructuredTextViewer;
import org.eclipse.wst.sse.ui.StructuredTextViewerConfiguration;
import org.eclipse.wst.sse.ui.preferences.CommonEditorPreferenceNames;
import org.eclipse.wst.sse.ui.preferences.PreferenceKeyGenerator;
import org.eclipse.wst.sse.ui.style.IHighlighter;
import org.eclipse.wst.sse.ui.style.LineStyleProvider;
import org.eclipse.wst.sse.ui.taginfo.AnnotationHoverProcessor;
import org.eclipse.wst.sse.ui.taginfo.ProblemAnnotationHoverProcessor;
import org.eclipse.wst.sse.ui.taginfo.TextHoverManager;
import org.eclipse.wst.sse.ui.util.EditorUtility;
import org.eclipse.wst.xml.core.text.rules.StructuredTextPartitionerForXML;
import org.eclipse.wst.xml.ui.doubleclick.XMLDoubleClickStrategy;
import org.eclipse.wst.xml.ui.internal.autoedit.StructuredAutoEditStrategyXML;
import org.eclipse.wst.xml.ui.internal.correction.CorrectionProcessorXML;
import org.eclipse.wst.xml.ui.reconcile.StructuredTextReconcilingStrategyForContentModel;
import org.eclipse.wst.xml.ui.reconcile.StructuredTextReconcilingStrategyForMarkup;


public class StructuredTextViewerConfigurationHTML extends StructuredTextViewerConfiguration {
	InformationPresenter fInformationPresenter = null;

	private boolean reconcilerStrategiesAreSet;

	private JavaSourceViewerConfiguration fJavaSourceViewerConfiguration;

	/*
	 * (non-Javadoc)
	 * 
	 * @see com.ibm.sse.editor.StructuredTextViewerConfiguration#getAutoEditStrategies(org.eclipse.jface.text.source.ISourceViewer)
	 */
	public Map getAutoEditStrategies(ISourceViewer sourceViewer) {
		Map result = super.getAutoEditStrategies(sourceViewer);

		if (result.get(StructuredTextPartitionerForHTML.ST_DEFAULT_HTML) == null)
			result.put(StructuredTextPartitionerForHTML.ST_DEFAULT_HTML, new ArrayList(1));
		if (result.get(StructuredTextPartitionerForHTML.ST_HTML_DECLARATION) == null)
			result.put(StructuredTextPartitionerForHTML.ST_HTML_DECLARATION, new ArrayList(1));

		IAutoEditStrategy autoEditStrategy = new StructuredAutoEditStrategyXML();
		List strategies = (List) result.get(StructuredTextPartitionerForHTML.ST_DEFAULT_HTML);
		strategies.add(autoEditStrategy);
		strategies = (List) result.get(StructuredTextPartitionerForHTML.ST_HTML_DECLARATION);
		strategies.add(autoEditStrategy);

		return result;
	}

	public IAutoIndentStrategy getAutoIndentStrategy(ISourceViewer sourceViewer, String contentType) {
		if (contentType.compareTo(StructuredTextPartitionerForHTML.ST_SCRIPT) == 0)
			// JavaScript
			return getJavaSourceViewerConfiguration().getAutoIndentStrategy(sourceViewer, StructuredTextPartitionerForHTML.ST_SCRIPT);
		else
			return super.getAutoIndentStrategy(sourceViewer, contentType);
	}

	public String[] getConfiguredContentTypes(ISourceViewer sourceViewer) {
		if (configuredContentTypes == null) {
			String[] xmlTypes = StructuredTextPartitionerForXML.getConfiguredContentTypes();
			String[] htmlTypes = StructuredTextPartitionerForHTML.getConfiguredContentTypes();
			configuredContentTypes = new String[2 + xmlTypes.length + htmlTypes.length];

			configuredContentTypes[0] = StructuredTextPartitioner.ST_DEFAULT_PARTITION;
			configuredContentTypes[1] = StructuredTextPartitioner.ST_UNKNOWN_PARTITION;

			int index = 0;
			System.arraycopy(xmlTypes, 0, configuredContentTypes, index += 2, xmlTypes.length);
			System.arraycopy(htmlTypes, 0, configuredContentTypes, index += xmlTypes.length, htmlTypes.length);
		}

		return configuredContentTypes;
	}

	public IContentAssistant getContentAssistant(ISourceViewer sourceViewer) {
		IContentAssistant ca = super.getContentAssistant(sourceViewer);

		if (ca != null && ca instanceof ContentAssistant) {
			ContentAssistant contentAssistant = (ContentAssistant) ca;

			IContentAssistProcessor htmlContentAssistProcessor = new HTMLContentAssistProcessor();
			IContentAssistProcessor jsContentAssistProcessor = new JavaScriptContentAssistProcessor();
			IContentAssistProcessor cssContentAssistProcessor = new CSSContentAssistProcessor();
			IContentAssistProcessor noRegionProcessorForHTML = new NoRegionContentAssistProcessorForHTML();

			// HTML
			addContentAssistProcessor(contentAssistant, htmlContentAssistProcessor, StructuredTextPartitionerForHTML.ST_DEFAULT_HTML);
			addContentAssistProcessor(contentAssistant, htmlContentAssistProcessor, StructuredTextPartitionerForHTML.ST_HTML_COMMENT);

			// JavaScript
			addContentAssistProcessor(contentAssistant, jsContentAssistProcessor, StructuredTextPartitionerForHTML.ST_SCRIPT);

			// CSS
			addContentAssistProcessor(contentAssistant, cssContentAssistProcessor, StructuredTextPartitionerForCSS.ST_STYLE);

			// unknown
			addContentAssistProcessor(contentAssistant, noRegionProcessorForHTML, StructuredTextPartitioner.ST_UNKNOWN_PARTITION);
		}

		return ca;
	}

	public IContentAssistant getCorrectionAssistant(ISourceViewer sourceViewer) {
		IContentAssistant ca = super.getCorrectionAssistant(sourceViewer);

		if (ca != null && ca instanceof ContentAssistant) {
			ContentAssistant correctionAssistant = (ContentAssistant) ca;
			ITextEditor editor = getTextEditor();
			if (editor != null) {
				IContentAssistProcessor correctionProcessor = new CorrectionProcessorXML(editor);
				correctionAssistant.setContentAssistProcessor(correctionProcessor, StructuredTextPartitionerForHTML.ST_DEFAULT_HTML);
				correctionAssistant.setContentAssistProcessor(correctionProcessor, StructuredTextPartitionerForXML.ST_XML_CDATA);
				correctionAssistant.setContentAssistProcessor(correctionProcessor, StructuredTextPartitionerForXML.ST_XML_COMMENT);
				correctionAssistant.setContentAssistProcessor(correctionProcessor, StructuredTextPartitionerForXML.ST_XML_DECLARATION);
				correctionAssistant.setContentAssistProcessor(correctionProcessor, StructuredTextPartitionerForXML.ST_XML_PI);
				correctionAssistant.setContentAssistProcessor(correctionProcessor, StructuredTextPartitionerForXML.ST_DTD_SUBSET);
			}
		}

		return ca;
	}

	public IContentFormatter getContentFormatter(ISourceViewer sourceViewer) {
		final MultiPassContentFormatter formatter = new MultiPassContentFormatter(getConfiguredDocumentPartitioning(sourceViewer), StructuredTextPartitionerForHTML.ST_DEFAULT_HTML);

		formatter.setMasterStrategy(new StructuredFormattingStrategy(new HTMLFormatProcessorImpl()));

		return formatter;
	}

	public ITextDoubleClickStrategy getDoubleClickStrategy(ISourceViewer sourceViewer, String contentType) {
		if (contentType.compareTo(StructuredTextPartitionerForHTML.ST_DEFAULT_HTML) == 0)
			// HTML
			return new XMLDoubleClickStrategy();
		else if (contentType.compareTo(StructuredTextPartitionerForHTML.ST_SCRIPT) == 0)
			// JavaScript
			return getJavaSourceViewerConfiguration().getDoubleClickStrategy(sourceViewer, contentType);
		else
			return super.getDoubleClickStrategy(sourceViewer, contentType);
	}

	public IHighlighter getHighlighter(ISourceViewer sourceViewer) {
		IHighlighter highlighter = super.getHighlighter(sourceViewer);

		if (highlighter != null) {
			// HTML
			LineStyleProvider htmlLineStyleProvider = new LineStyleProviderForHTML();
			highlighter.addProvider(StructuredTextPartitionerForHTML.ST_DEFAULT_HTML, htmlLineStyleProvider);
			highlighter.addProvider(StructuredTextPartitionerForHTML.ST_HTML_COMMENT, htmlLineStyleProvider);
			highlighter.addProvider(StructuredTextPartitionerForHTML.ST_HTML_DECLARATION, htmlLineStyleProvider);

			// JavaScript
			LineStyleProvider jsLineStyleProvider = new LineStyleProviderForJavaScript();
			highlighter.addProvider(StructuredTextPartitionerForHTML.ST_SCRIPT, jsLineStyleProvider);

			// CSS
			LineStyleProvider cssLineStyleProvider = new LineStyleProviderForEmbeddedCSS();
			highlighter.addProvider(StructuredTextPartitionerForCSS.ST_STYLE, cssLineStyleProvider);
		}

		return highlighter;
	}

	public IInformationPresenter getInformationPresenter(ISourceViewer sourceViewer) {
		if (fInformationPresenter == null) {
			fInformationPresenter = new InformationPresenter(getInformationPresenterControlCreator(sourceViewer));

			// HTML
			IInformationProvider htmlInformationProvider = new HTMLInformationProvider();
			fInformationPresenter.setInformationProvider(htmlInformationProvider, StructuredTextPartitionerForHTML.ST_DEFAULT_HTML);

			// JavaScript
			IInformationProvider javascriptInformationProvider = new JavaScriptInformationProvider();
			fInformationPresenter.setInformationProvider(javascriptInformationProvider, StructuredTextPartitionerForHTML.ST_SCRIPT);

			fInformationPresenter.setSizeConstraints(60, 10, true, true);
		}

		return fInformationPresenter;
	}

	private IModelManager getModelManager() {

		IModelManagerPlugin plugin = (IModelManagerPlugin) Platform.getPlugin(IModelManagerPlugin.ID);
		return plugin.getModelManager();
	}

	/**
	 * @see org.eclipse.jface.text.source.SourceViewerConfiguration#getReconcilerg(org.eclipse.jface.text.source.ISourceViewer)
	 */
	public IReconciler getReconciler(ISourceViewer sourceViewer) {
		if (fReconciler != null) {
			// a reconciler should always be installed or disposed of
			if (!fReconciler.isInstalled()) {
				fReconciler = null;
				reconcilerStrategiesAreSet = false;
			}
		}

		// the first time running through, there's no model (so no pref store)
		// but the reconciler still needs to be created so that its document gets set	
		if (fReconciler == null) {
			// create one
			fReconciler = new StructuredTextReconciler();
			// a null editorPart is valid
			//fReconciler.setEditor(editorPart);
		}

		IPreferenceStore store = ((AbstractUIPlugin) Platform.getPlugin(SSE_EDITOR_ID)).getPreferenceStore();
		boolean reconcilingEnabled = store.getBoolean(CommonEditorPreferenceNames.EVALUATE_TEMPORARY_PROBLEMS);

		// the second time through, the strategies are set
		if (fReconciler != null && !reconcilerStrategiesAreSet && reconcilingEnabled) {
			StructuredTextViewer viewer = null;
			if (sourceViewer instanceof StructuredTextViewer) {
				viewer = ((StructuredTextViewer) sourceViewer);
			}

			IStructuredModel sModel = getModelManager().getExistingModelForRead(viewer.getDocument());
				try {
				if (sModel != null) {
					// check language (ContentTypeID)....
					String contentTypeId = sModel.getContentTypeIdentifier(); //sModel.getModelHandler().getAssociatedContentTypeId();
					String generatedKey = PreferenceKeyGenerator.generateKey(CommonEditorPreferenceNames.EDITOR_VALIDATION_METHOD, contentTypeId);
					String validationMethodPref = EditorPlugin.getInstance().getPreferenceStore().getString(generatedKey);
	
					IReconcilingStrategy defaultStrategy = null;
	
					// pref set to no validation, so return
					if (validationMethodPref.equals(CommonEditorPreferenceNames.EDITOR_VALIDATION_NONE) || validationMethodPref.trim().length() == 0)
						return fReconciler;
	
					// "Content Model" strategies (requires propagating adapter from AdapterFactoryProviderFor*)
					else if (validationMethodPref.equals(CommonEditorPreferenceNames.EDITOR_VALIDATION_CONTENT_MODEL)) {
						defaultStrategy = new StructuredTextReconcilingStrategyForContentModel((ITextEditor) editorPart);
					}
	
					// "workbench default" strategies
					else if (validationMethodPref.equals(CommonEditorPreferenceNames.EDITOR_VALIDATION_WORKBENCH_DEFAULT)) {
	
						IReconcilingStrategy markupStrategy = new StructuredTextReconcilingStrategyForMarkup((ITextEditor) editorPart);
						IReconcilingStrategy xmlStrategy = new StructuredTextReconcilingStrategyForContentModel((ITextEditor) editorPart);
	
						fReconciler.setReconcilingStrategy(markupStrategy, StructuredTextPartitioner.ST_DEFAULT_PARTITION);
	
						fReconciler.setReconcilingStrategy(xmlStrategy, StructuredTextPartitionerForXML.ST_DEFAULT_XML);
	
						//----------------------------------------------------------------------------------
						// valdator extension point
						//----------------------------------------------------------------------------------
						fReconciler.setValidatorStrategy(createValidatorStrategy(contentTypeId));
						//----------------------------------------------------------------------------------
						defaultStrategy = markupStrategy;
					}
					fReconciler.setDefaultStrategy(defaultStrategy);
					reconcilerStrategiesAreSet = true;
				}
			}
			finally  {
				if(sModel != null)
					sModel.releaseFromRead();
			}
		}
		return fReconciler;
	}

	public ITextHover getTextHover(ISourceViewer sourceViewer, String contentType, int stateMask) {
		// HTML
		if (contentType.equals(StructuredTextPartitionerForHTML.ST_DEFAULT_HTML)) {
			TextHoverManager.TextHoverDescriptor[] hoverDescs= EditorPlugin.getDefault().getTextHoverManager().getTextHovers();
			int i= 0;
			while (i < hoverDescs.length) {
				if (hoverDescs[i].isEnabled() &&  EditorUtility.computeStateMask(hoverDescs[i].getModifierString()) == stateMask) {
					String hoverType = hoverDescs[i].getId();
					if (TextHoverManager.COMBINATION_HOVER.equalsIgnoreCase(hoverType))
						return new HTMLBestMatchHoverProcessor();
					else if (TextHoverManager.PROBLEM_HOVER.equalsIgnoreCase(hoverType))
						return new ProblemAnnotationHoverProcessor();
					else if (TextHoverManager.ANNOTATION_HOVER.equalsIgnoreCase(hoverType))
						return new AnnotationHoverProcessor();
					else if (TextHoverManager.DOCUMENTATION_HOVER.equalsIgnoreCase(hoverType))
							return new HTMLTagInfoHoverProcessor();
				}
				i++;
			}
		}
		// JavaScript
		else if (contentType.equals(StructuredTextPartitionerForHTML.ST_SCRIPT)) {
			TextHoverManager.TextHoverDescriptor[] hoverDescs= EditorPlugin.getDefault().getTextHoverManager().getTextHovers();
			int i= 0;
			while (i < hoverDescs.length) {
				if (hoverDescs[i].isEnabled() &&  EditorUtility.computeStateMask(hoverDescs[i].getModifierString()) == stateMask) {
					String hoverType = hoverDescs[i].getId();
					if (TextHoverManager.COMBINATION_HOVER.equalsIgnoreCase(hoverType))
						return new JavaScriptBestMatchHoverProcessor();
					else if (TextHoverManager.PROBLEM_HOVER.equalsIgnoreCase(hoverType))
						return new ProblemAnnotationHoverProcessor();
					else if (TextHoverManager.ANNOTATION_HOVER.equalsIgnoreCase(hoverType))
						return new AnnotationHoverProcessor();
					else if (TextHoverManager.DOCUMENTATION_HOVER.equalsIgnoreCase(hoverType))
							return new JavaScriptTagInfoHoverProcessor();
				}
				i++;
			}
		}
		return super.getTextHover(sourceViewer, contentType, stateMask);
	}

	public void unConfigure(ISourceViewer viewer) {
		super.unConfigure(viewer);

		// InformationPresenters
		if (fInformationPresenter != null)
			fInformationPresenter.uninstall();
	}

	private JavaSourceViewerConfiguration getJavaSourceViewerConfiguration() {
		if (fJavaSourceViewerConfiguration == null) {
			IPreferenceStore store = PreferenceConstants.getPreferenceStore();
			JavaTextTools javaTextTools = new JavaTextTools(store);
			fJavaSourceViewerConfiguration = new JavaSourceViewerConfiguration(javaTextTools, getTextEditor());
		}
		return fJavaSourceViewerConfiguration;
	}
}